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The effects of calcination temperature on properties of porous lanthanum titanate using PEG4000 template in a sol-gel route were studied. Photocatalytic degradation of Reactive Brilliant Red X3B on the materials was evaluated. Monoclinic La 2 Ti 2 O 7  was synthesized in all the samples. The growing up of La 2 Ti 2 O 7  crystals leads to apparent increases in crystallite size and cell volume with increasing calcination temperature. The  E g values for the samples are 3.38, 3.40, 3.33 3.36 and 3.44 eV when calcination temperature increases from 600 °C to 1,000 °C. High temperature calcination leads to apparent loss of both specific surface area and pore volume, although the average pore size is nearly unchanged. The decoloration efficiency by adsorption is in close relationship to the surface area of the materials. The sample prepared at 900 °C has the maximum photocatalytic activity on degradation of Reactive Brilliant Red X3B in aqueous solution. A continuous loss of degradation efficiency is observed after recycling of the material due to complex reasons.

Effects of calcination temperature on sol-gel synthesis of porous La 2 Ti 2 O 7 photocatalyst on degradation of Reactive Brilliant Red X 3 B